Heat-gbindeb



W. J. ANDERSON.

MEM GRINDER. APPLICATION FILED .IULY 2, 1920.

W. J. ANDERSON.

MEAT GRINDER.

APPLICATION FILI-:D IuLv 2.1920.

1,375,766. Patented Apr. 26,1921.

2 SHEETS-SHEET 2.

nvenor:

UNITED sTArss 'PATENT OFFICE.

WILLIAM'JOHNv ANDERSON, or DULUTH, MINNESOTA.

MEAT-GRINDER.

,To di whom it may concern.'

Y it known that i, TWiLLiAM JOHN AN- DnnsoN, a subject of the ingof Sweden, residing'v atk Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful improvements in ivffeat-Grinders, of which the4 following is a speciicatior reference being had therein to the accompanying drawing. y

This invention relates to grinding or meat chopping machines and particularly to that class of meat chopper in which the .cutting c knife operates at a Vdifferent speed torthat of the feeding screw or worm.`

vTheprincipal object is to produce an imfor such a machine.V

Another object is to produce `a novel form proved form of cutting and chopping knife of worin adjacent the knife for efficient c ooperative action with the novel form of knife.

Still other objects and advantages of the device will appear in the further description thereof.

In the accompanying drawings forming part of this application Land in which like reference characters indicate iike parts:

lFigure 1 is a vertical centralv longitudinal section, partly in elevation, of the assembledlparts directly associated with the worin i of such a machine,`A f

Fig. 2 is an elevation of the. end of the machine in which the driving gear is housed,

Fig. 3 is an elevation of the opposite end of the machine,

Fig. a is a transverse sectional view on the line le-i Fig. 6,

Fig. 5 isa transverse sectional view on the line 5-5,' Fig. 1,

Fig. 6 is a plan view of one half of the chopping or cutting knife, and

Fig. 7 vis a similar view of the other half of the knife.

1 represents the cylindrical body portion of the machine which is of the usual construction, having internal longitudinally disposed ribs 2 therein and the usual feeding hopper 3 formed integral therewith. lithin the body portion l is mounted the graduated feeding worm 4, it being` upon a sectional aXial shaft comprising the cooperative parts 5 and 6, the former being journaled within the driving or head end of Specicatien of Letters Patent. .Patented Apr. 26, 192L Application filed July 2, 19270.( Serial No. 393,643'. Y

telescopic connection being rectangular in cross section so that the part 6 is driven by the part 5 as is common in similar machines.

A planetary gear arrangement is housed within the head end of the body portion 1 and is so arranged that the axial shaft upon which the worm i is mounted is rotated at a greater speed than the worm, which is common in such machines and forms no part of my present invention, therefore necessitating no detailed description thereof, other than to say that the axial shaft is driven directly by power being applied thereto, either manually or mechanically, and the worm is' driven throughthe medium of the intermediate spur gears 8 and 9 meshing with the enlarged toothed portion 10 of said axial shaft and the enlarged internally toothed portion 11 of the 'sleeve 12, which `is cooperatively'connected with the worm 4 andA in whichpsleeve the section 5 of the axial shaft is journaled, the outer end of the said section 5 being journaled in the cover plate 13: Any suitable form'of ball bear# ing, as illustratedat 14, may be employed .as a thrust bearing for the worm at the erated. The member 17 is carried rigidlyfixed to the end of the worm as by suitable screws'indicated at 18. The opposite face of the annular enlargement 15, on the section 6, to that against which the balls of the bearing `are engaged, is made concaved inv shape toreceive the conveXed portion'19 of the sectional chopping knife, which is composed of the twopartsQO and 21. That portion of the shaft 6, directly adjacent the concaved face of the enlargement 15, is square in crosssection, and the hole of the two part cutter or knife is also Vsquare to snugly ht over same, said hole vbeing distinctly shown at 22 in Figs. 6 and 7 of the drawings. rlhe section 2O of the knife may be termed the carrying section, as the outer face of same is stepped as at 23 for the reception ofthe flat back of the section 21, said stepped portion being of the same shape in outline for the proper registration of the section 21 when applied thereto. Two of the diagonally oppositel edges of the carrying section 2O of the cutter are both, in plan view and in transverse sectional view, arcu-l ate in shape, as illustiated at 24 andk Vrespectively, the curvature 25, upon each half of the section, continuing from the edge of the stepped portion 23 outwardly toward and merging into the arcuate edge 24 of the section 20.

The gathering and cutting ribs 26, are formed upon the section 2l of the cutter, there being 4 of such upon either side of the center, and formed diagonally across the blade in opposite directions on eitherl side of the center thereof; The forward or leading end of each rib is turned at an Y angle to the body portion thereof in order to produea gathering in effectV of each rib as the blade rotates, thus effectually assisting the discharge of the meat from the end of the Worm, and, in fact, resulting in- Y completely discharging all ofthe contentsV of the meat chopper at the conclusion of anV thfumbscrfeivs. 29, is the ring 30, having formed integrally therewith the radial arm 3l, which is turned inwardly at its cxtreme end, as at 32, toward thegrid 27, Where it forms a journalA bearing for the end of the shaftV section r6, the latter being round Vin form in that poi-tion which extends through the gridV and intothe Sleevef32. VThis form of vradially disposed support for the end of the shaft vis very much more satisfactory in operation than Where said support is made to extend entirely across the end of the sup-- .port as it is evidentrthat with this constriui'- tion the meat coming through the grid is entirely free to fall from thesupport. x By having the chopping knife or blade made in two sections, as previously described,

it becomes possible to use the receiving see- Vend of the Worm and a grid engaging knife intermediate the propeller-like knife and the grid.

2. A grinding knife for meat chopping machines of the character described comprising a plurality of substantially arcuately shaped spaced cutting and forcing ribs upon either side of the center thereof.

3. A grinding knife for meat chopping machines of the character described coinprising a plurality of substantially arcuately shaped spacedcuttmg and forcing ribs `upon either side of the center thereof, the ribs on `one side being diagonally disposed in the opposite direction to those upon the other side.

4l. A separable tivospart knife foi meat chopping and grinding machines of the character described, one of said parts comprising a hub portion and a propeller like blade portion upon eitherside of the hub; the other part comprising a hub portion vand upon either side thereof a plurality of ribs; the two parts being coperatively engageable as and for the purpose described.

5. A., grindingknife for ,meat chopping machines of vthe character described coniprisiiig a hub portion, arms extending in opposite directions from said hub portion, and av plurality of spaced cutting Aandforciing` ribs upon said arms for the purpose described'.V h Y in testimony whereof l hereunto affix my signature in the presence of tivo witnesses.

WILLAM JOHN ANDERSON. 

